If 20% of a number is added to another number, the second number increases by 50%. What is the ratio of the first number to the second number? MCQ with Answer and Explanation

Question

If 20% of a number is added to another number, the second number increases by 50%. What is the ratio of the first number to the second number?

A. 2:5

B. 2:1

C. 1:2

D. 5:2

Answer: Option D

Solution (By JKSSB Mock Tests)

Let first = x, second = y. 0.2x + y = 1.5y → 0.2x = 0.5y → x/y = 0.5/0.2 = 5/2. Ratio = 5:2.

This question belongs to: Maths Percentage

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Question #1

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What is 30% of 30% of 200?

A. 24

B. 20

C. 30

D. 18

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Correct Answer: Option D

Explanation:
0.3 × 0.3 × 200 = 18.

This question belongs to: Maths Percentage

Question #2

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A man's salary increased from Rs. 12000 to Rs. 15000. Percentage increase is:

A. 22.5%

B. 20%

C. 25%

D. 27.5%

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Correct Answer: Option C

Explanation:
Increase = 3000, % = (3000/12000)×100 = 25%.

This question belongs to: Maths Percentage

Question #3

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A man sells two articles for Rs. 120 each. On one he gains 20%, and on the other he loses 20%. Find his overall profit or loss percent.

A. No profit no loss

B. 4% loss

C. 2% loss

D. 1% loss

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Correct Answer: Option B

Explanation:
CP1 = 120/1.2=100, CP2=120/0.8=150. Total CP=250, SP=240. Loss=10, %=(10/250)×100=4% loss.

This question belongs to: Maths Percentage

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